Update: Well that took all afternoon, but I got it fixed! They changed something on their end and that was not obvious from the error messages it was giving me. But once I got it working, I took a victory lap and made sure all Facebook connections come through HTTPS.

I'm not sure if this is on me, or Facebook, but we've got major Facebook login problems happening right now.

I'm trying to track down the problem, but I'm not getting anywhere. If you were able to login to the site via Facebook in the last 3 days please let me know in the comments to this post! Thank you.

Facebook keeps saying the codes it is giving me are expired or already used...